Tube-cutting device



yG. w. SIMPSON.

TUBE CUTTING DEVICE. APPLICATION FILEDIUIIEZT. 192|.

Ptented Oct. 18, 1921.

UNITED STATES PATENT OFFICE.

TUBE-CUTTING DEVICE.

Application filed J'une 27, 1921.

To all w hom it may concern:

Be it known that I, GEORGE W. SIMPSON, a citizen of the United States of America, and resident of Bristow, in the county of Creek and State of Oklahoma, have invented certain new and useful Improvements in Tube-Cutting Devices, of which the following is a specification.

This invention relates to pipe cutters, and has for an object the production ofv a pipe cutter which is centering and in which the cutter wheel isy braced by two sets of rollers, one set of which is on one side of the axis of a cutter wheel and the other Set of which is on the other side of the said axis.

It is furthermore an object of this invention to produce a cutter of the character in dicated in which the supporting rollers are at an acute anglevto form clearances for connecting rods which are employed for connecting a feed cone to the' ratchet'or other feed mechanism by which the cone is moved with relationto the cutting wheel.

It is a further object of this invention to produce'v a feeding mechanism in which the cone is held centered with relation to the axis of the tube to be cut, a condition which results in proper feeding'action of the cutter wheel. v

. It is a stillfurther object of this invention to produce a cutter having a feed operating handle, associated with ratchet mechanism requiring afmanual application of the handle to cause it to mesh; and the device furthermore contemplates the pro` vision of means whereby the handle acts as a crank for turning the feed screw to its neutral position.

With the foregoing and other objects in view, the invention consists in the details of construction, and in the arrangement and combination of parts to be hereinafter more fully set forth and claimed.

In describing the invention in detail, reference will be had` to the accompanying drawings forming part of this application wherein like characters denote corresponding parts in the several views, and in which- `Figure l illustrates a vertical sectional view of a pipe cutter embodying the inven- V tion Fig. 2 illustrates a sectional View on the line 2 2 of Fig. 1; and

Specification of Letters Patent.

Patented Oct. 18, 1921.

serial No. 480,773.

Fig. 3 illustrates an enlarged detailed Sectional view of fragments of the device.

In these drawings 5 denotes the barrel or housing of the cutting mechanism having a gage ring Gapplied to it and held at different positions of adjustment thereon by the set screws 7, the said gage ring having an annular seat 8 to engage the edge of the flange 9 of the gage 10, which is held in place by the abutment of the tube 11 which is to be cut. The casing 5 has a reinforced wall as at 12, the said reinforced portion being slotted on one side as at 13, and slotted on the other side as shown at 14 and 15 to form clearances for the passage of the guiding rollers 16 and 17 respectively.

The cutter wheel 18 is rotatably mounted on the arms 19 of a sliding element 20 which moves through the slot 13 for the purpose of carrying the cutting wheel into engagement with the ,pipe 11. The sliding element Ais in the nature ofv a block adapted to be forced outwardly during the cutting operation, and it is normally under the pressure of springs 21 interposed between the body and the barrel or casing. The wheels 16 and 17 are carried by blocks 22 and 23 respectively which converge toward the center of the casing, and these sliding blocks have bearing surfaces 24 and 25 re- Spectively, which are engaged by a conical wedge 26 the said conical wedge also engaging the sliding element which carries the cutter wheel, so that the pressure is equally distributed as the feed screw operates, as will presently appear, for drawing the wedgeinto engagement with the blocks. The wheels/16 and 17 are forced inwardly normally by springs 27, and as the sliding blocks are of identical construction, the manner of applying the springs will, it is thought, be understood.

The barrel has a head 28 with a trunnion 29 projecting from it, preferably externally threaded as at 30. The trunnion engages a collar 31 which carries a guide 32, the said guide engaging the inner wall of the tube to be cut, so that the barrel is maintained concentric to the said tube.

A feed screw 33 is projected through the head 34 of the barrel or casing and it has a feed nut 35 on its end, the said feed nut having an arm 36 projecting at an angle to the axis of the shaft. A ratchet wheel 37 is secured on the barrel or casing and it is engaged by a dog 38 oscillated by a handle 39 for the purpose of rotating the barrel, it being understood that the feed nut will be struck during the oscillation of the handle for the purpose of moving the screw when desired. This operation is brought about by the presence of a pin 40 which may be extended from the ratchet and pawl mechanism, it being understood that the feed pin may be removed from engagement with the ratchet and pawl mechanism when the feeding action is to be omitted.

VThe feed screw 33 has a head '41 from which rods 42 extend longitudinally of the barrel or casing, and the opposite ends of these rods are connected to the conical wedge:

for drawing the wedge longitudinally of the barrel asthe feed nut is rotated, an operation which results in pulling the conical wedge for forcing the, cutter wheel outwardly yinto engagement with thertube to be cut. Y

The device of this invention presents advantages over known devices in that the presence of the rollers in the relation tosaid blocks, means for urging the blocks inwardly, a conical wedge inthe said casing, rods connected thereto and extending longitudinally of the casing, a screw head to which the rods are attached, a screw extending from the head and projecting from an end of the casing, and means for moving the screw longitudinally of the casing, a

guide for supporting the casing concentric to a tube, and a gage ring secured to the said casing and adaptedto hold the opposite end of the said tube! 2. In a tube cutting device, a casing having longitudinally disposed slots between its ends, a sliding member projecting through one of the slots, Va cutter wheel rotatably mounted on the sliding member, means for urging the sliding member inwardly, blocks disposedV at acuteangles to vthe sliding Amemberl extending through other slots of the casing, anti-friction rollers journaled in the said blocks, means vfor urging the blocks inwardly, a conical wedge in the said casing, rods connected thereto and extending longitudinally of the casing, a screw yhead to which the rods are attached, a screw` extending from the head and projecting from an end of the'casing, means for moving the screw longitudinally of the casing,'a guide for supporting the casing concentric to a tube,a gageV ring secured to the said casing and adapted to hold: thev opposite end of the said tube, and means for rotating the casing'.v

3. In atube cutting machine, a casing the said casing having longitudinally disposed slots,a sliding element movable through one of the slots, a Vcutter wheel mountedthereon,v

blocks arranged atfacute angles with relation to the sliding element and slidable in other slots in the casing, anti-friction rollersv journa'led in said blocks, a' conicalwedge interposed between the sliding element and the said blocks, rodsconnected to the conical wedge, a screw extending through one end of the casing andterminating in a head to which the sliding blocks are connected, a feed nut en the screw beyond the said casing` a dog` and ratchet for rotating the casing, adjustable means forl movingy the motion of the casing rotating means to the said feed;

nut, and meansffor holding the opposite 'end of the casing concentric withV a tube to be cut. f

enon'en w. siMPsoN. 

